The Tbilisi Holy Trinity Cathedral commonly known as Sameba (Georgian: სამება for Trinity) is the main Georgian Orthodox Christiancathedral, located in Tbilisi, the capital of Georgia. Constructed between 1995 and 2004, it is the largest religious buildings in Georgia and the South Caucasu

The Cathedral consists of nine chapels (chapels of the Archangels, John the Baptist, Saint Nino, Saint George, Saint Nicholas, the Twelve Apostles, and of the All Saints), five of them situated in a large underground compartment. The overall area of the cathedral, including a large narthex, is 5,000 square meters and the volume it occupies is 137 cubic meters. The inner perimeter of the church is 56 m × 44 m. The space totals 2,380 square meters. The height of the cathedral from the ground to the top of the cross is 84 meters. The underground chapel occupies 35,550 cubic meters. The height is 13 meters.

The Cathedral represents the synthesis of traditional styles dominating the Georgian church architecture at various stages of its history, but also contains several innovations.